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Move back here from gnu/dist/mrinfo now that mrouted license is cleared.

This commit is contained in:
wiz 2003-03-05 21:58:20 +00:00
parent d67d82e27f
commit ba718fd8b9
3 changed files with 700 additions and 0 deletions
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usr.sbin/mrinfo/Makefile Normal file
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# $NetBSD: Makefile,v 1.9 2003/03/05 21:58:20 wiz Exp $
# from: Id: Makefile,v 1.5 1993/06/24 05:11:16 deering Exp
.include <bsd.own.mk>
.PATH: ${NETBSDSRCDIR}/usr.sbin/mrouted
CPPFLAGS+= -I${NETBSDSRCDIR}/usr.sbin/mrouted
PROG= mrinfo
SRCS= igmp.c inet.c kern.c mrinfo.c
MAN= mrinfo.8
BINOWN= root
BINMODE=4555
.include <bsd.prog.mk>

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usr.sbin/mrinfo/mrinfo.8 Normal file
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.\" $NetBSD: mrinfo.8,v 1.6 2003/03/05 21:58:20 wiz Exp $
.\"
.TH MRINFO 8
.UC 5
.SH NAME
mrinfo \- Displays configuration info from a multicast router
.SH SYNOPSIS
.B /usr/sbin/mrinfo
[
.B \-d
.I debug_level
] [
.B \-r
.I retry_count
] [
.B \-t
.I timeout_count
]
.B multicast_router
.SH DESCRIPTION
.I mrinfo
attempts to display the configuration information from the multicast router
.I multicast_router.
.PP
.I mrinfo
uses the ASK_NEIGHBORS IGMP message to the specified multicast router. If this
multicast router responds, the version number and a list of their neighboring
multicast router addresses is part of that response. If the responding router
has a recent multicast version number, then
.I mrinfo
requests additional information such as metrics, thresholds, and flags from the
multicast router. Once the specified multicast router responds, the
configuration is displayed to the standard output.
.br
.ne 5
.SH INVOCATION
.PP
"\-d" option sets the debug level. When the debug level is greater than the
default value of 0, addition debugging messages are printed. Regardless of
the debug level, an error condition, will always write an error message and will
cause
.I mrinfo
to terminate.
Non-zero debug levels have the following effects:
.IP "level 1"
packet warnings are printed to stderr.
.IP "level 2"
all level 1 messages plus notifications down networks are printed to stderr.
.IP "level 3"
all level 2 messages plus notifications of all packet
timeouts are printed to stderr.
.PP
"\-r retry_count" sets the neighbor query retry limit. Default is 3 retry.
.PP
"\-t timeout_count" sets the number of seconds to wait for a neighbor query
reply. Default timeout is 4 seconds.
.PP
.SH SAMPLE OUTPUT
.nf
.I mrinfo mbone.phony.dom.net
127.148.176.10 (mbone.phony.dom.net) [version 3.3]:
127.148.176.10 -\*[Gt] 0.0.0.0 (?) [1/1/querier]
127.148.176.10 -\*[Gt] 127.0.8.4 (mbone2.phony.dom.net) [1/45/tunnel]
127.148.176.10 -\*[Gt] 105.1.41.9 (momoney.com) [1/32/tunnel/down]
127.148.176.10 -\*[Gt] 143.192.152.119 (mbone.dipu.edu) [1/32/tunnel]
.fi
.PP
For each neighbor of the queried multicast router, the IP of the queried router
is displayed, followed by the IP and name of the neighbor. In square brackets
the metric (cost of connection), the treashold (multicast ttl) is displayed. If
the queried multicast router has a newer version number, the type (tunnel,
srcrt) and status (disabled, down) of the connection is displayed.
.PP
.SH IMPORTANT NOTE
.I mrinfo
must be run as root.
.PP
.SH SEE ALSO
.BR mrouted (8) ,
.BR map-mbone (8) ,
.BR mtrace (8)
.PP
.SH AUTHOR
Van Jacobson

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usr.sbin/mrinfo/mrinfo.c Normal file
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/* $NetBSD: mrinfo.c,v 1.20 2003/03/05 21:58:21 wiz Exp $ */
/*
* This tool requests configuration info from a multicast router
* and prints the reply (if any). Invoke it as:
*
* mrinfo router-name-or-address
*
* Written Wed Mar 24 1993 by Van Jacobson (adapted from the
* multicast mapper written by Pavel Curtis).
*
* The lawyers insist we include the following UC copyright notice.
* The mapper from which this is derived contained a Xerox copyright
* notice which follows the UC one. Try not to get depressed noting
* that the legal gibberish is larger than the program.
*
* Copyright (c) 1993 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ---------------------------------
* Copyright (c) 1992, 2001 Xerox Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* Neither name of the Xerox, PARC, nor the names of its contributors may be used
* to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE XEROX CORPORATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char rcsid[] =
"@(#) Header: mrinfo.c,v 1.6 93/04/08 15:14:16 van Exp (LBL)";
#else
__RCSID("$NetBSD: mrinfo.c,v 1.20 2003/03/05 21:58:21 wiz Exp $");
#endif
#endif
#include <string.h>
#include <netdb.h>
#include <sys/time.h>
#include <poll.h>
#include "defs.h"
#include <arpa/inet.h>
#include <stdarg.h>
#define DEFAULT_TIMEOUT 4 /* How long to wait before retrying requests */
#define DEFAULT_RETRIES 3 /* How many times to ask each router */
u_int32_t our_addr, target_addr = 0; /* in NET order */
int debug = 0;
int nflag = 0;
int retries = DEFAULT_RETRIES;
int timeout = DEFAULT_TIMEOUT;
int target_level = 0;
vifi_t numvifs; /* to keep loader happy */
/* (see COPY_TABLES macro called in kern.c) */
char * inet_name(u_int32_t addr);
void ask(u_int32_t dst);
void ask2(u_int32_t dst);
int get_number(int *var, int deflt, char ***pargv,
int *pargc);
u_int32_t host_addr(char *name);
void usage(void);
/* to shut up -Wstrict-prototypes */
int main(int argc, char *argv[]);
/* logit() prototyped in defs.h */
char *
inet_name(u_int32_t addr)
{
struct hostent *e;
struct in_addr in;
if (addr == 0)
return "local";
if (nflag ||
(e = gethostbyaddr((char *)&addr, sizeof(addr), AF_INET)) == NULL) {
in.s_addr = addr;
return (inet_ntoa(in));
}
return (e->h_name);
}
/*
* Log errors and other messages to stderr, according to the severity of the
* message and the current debug level. For errors of severity LOG_ERR or
* worse, terminate the program.
*/
void
logit(int severity, int syserr, const char *format, ...)
{
va_list ap;
switch (debug) {
case 0:
if (severity > LOG_WARNING)
return;
case 1:
if (severity > LOG_NOTICE)
return;
case 2:
if (severity > LOG_INFO)
return;
default:
if (severity == LOG_WARNING)
fprintf(stderr, "warning - ");
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
if (syserr == 0)
fprintf(stderr, "\n");
else
fprintf(stderr, ": %s\n", strerror(syserr));
}
if (severity <= LOG_ERR)
exit(1);
}
/*
* Send a neighbors-list request.
*/
void
ask(u_int32_t dst)
{
send_igmp(our_addr, dst, IGMP_DVMRP, DVMRP_ASK_NEIGHBORS,
htonl(MROUTED_LEVEL), 0);
}
void
ask2(u_int32_t dst)
{
send_igmp(our_addr, dst, IGMP_DVMRP, DVMRP_ASK_NEIGHBORS2,
htonl(MROUTED_LEVEL), 0);
}
/*
* Process an incoming neighbor-list message.
*/
void
accept_neighbors(u_int32_t src, u_int32_t dst, u_char *p, int datalen,
u_int32_t level)
{
u_char *ep = p + datalen;
#define GET_ADDR(a) (a = ((u_int32_t)*p++ << 24), a += ((u_int32_t)*p++ << 16),\
a += ((u_int32_t)*p++ << 8), a += *p++)
printf("%s (%s):\n", inet_fmt(src, s1), inet_name(src));
while (p < ep) {
u_int32_t laddr;
u_char metric;
u_char thresh;
int ncount;
GET_ADDR(laddr);
laddr = htonl(laddr);
metric = *p++;
thresh = *p++;
ncount = *p++;
while (--ncount >= 0) {
u_int32_t neighbor;
GET_ADDR(neighbor);
neighbor = htonl(neighbor);
printf(" %s -> ", inet_fmt(laddr, s1));
printf("%s (%s) [%d/%d]\n", inet_fmt(neighbor, s1),
inet_name(neighbor), metric, thresh);
}
}
}
void
accept_neighbors2(u_int32_t src, u_int32_t dst, u_char *p, int datalen,
u_int32_t level)
{
u_char *ep = p + datalen;
u_int broken_cisco = ((level & 0xffff) == 0x020a); /* 10.2 */
/* well, only possibly_broken_cisco, but that's too long to type. */
printf("%s (%s) [version %d.%d", inet_fmt(src, s1), inet_name(src),
level & 0xff, (level >> 8) & 0xff);
if ((level >> 16) & NF_LEAF) { printf (",leaf"); }
if ((level >> 16) & NF_PRUNE) { printf (",prune"); }
if ((level >> 16) & NF_GENID) { printf (",genid"); }
if ((level >> 16) & NF_MTRACE) { printf (",mtrace"); }
printf ("]:\n");
while (p < ep) {
u_char metric;
u_char thresh;
u_char flags;
int ncount;
u_int32_t laddr = *(u_int32_t*)p;
p += 4;
metric = *p++;
thresh = *p++;
flags = *p++;
ncount = *p++;
if (broken_cisco && ncount == 0) /* dumb Ciscos */
ncount = 1;
if (broken_cisco && ncount > 15) /* dumb Ciscos */
ncount = ncount & 0xf;
while (--ncount >= 0 && p < ep) {
u_int32_t neighbor = *(u_int32_t*)p;
p += 4;
printf(" %s -> ", inet_fmt(laddr, s1));
printf("%s (%s) [%d/%d", inet_fmt(neighbor, s1),
inet_name(neighbor), metric, thresh);
if (flags & DVMRP_NF_TUNNEL)
printf("/tunnel");
if (flags & DVMRP_NF_SRCRT)
printf("/srcrt");
if (flags & DVMRP_NF_PIM)
printf("/pim");
if (flags & DVMRP_NF_QUERIER)
printf("/querier");
if (flags & DVMRP_NF_DISABLED)
printf("/disabled");
if (flags & DVMRP_NF_DOWN)
printf("/down");
if (flags & DVMRP_NF_LEAF)
printf("/leaf");
printf("]\n");
}
}
}
int
get_number(int *var, int deflt, char ***pargv, int *pargc)
{
if ((*pargv)[0][2] == '\0') { /* Get the value from the next
* argument */
if (*pargc > 1 && isdigit((*pargv)[1][0])) {
(*pargv)++, (*pargc)--;
*var = atoi((*pargv)[0]);
return 1;
} else if (deflt >= 0) {
*var = deflt;
return 1;
} else
return 0;
} else { /* Get value from the rest of this argument */
if (isdigit((*pargv)[0][2])) {
*var = atoi((*pargv)[0] + 2);
return 1;
} else {
return 0;
}
}
}
void
usage(void)
{
fprintf(stderr,
"Usage: mrinfo [-n] [-t timeout] [-r retries] [router]\n");
exit(1);
}
int
main(int argc, char *argv[])
{
int tries;
int trynew;
struct timeval et;
struct hostent *hp;
struct hostent bogus;
char *host;
int curaddr;
if (geteuid() != 0) {
fprintf(stderr, "mrinfo: must be root\n");
exit(1);
}
init_igmp();
if (setuid(getuid()) == -1)
logit(LOG_ERR, errno, "setuid");
setlinebuf(stderr);
argv++, argc--;
while (argc > 0 && argv[0][0] == '-') {
switch (argv[0][1]) {
case 'd':
if (!get_number(&debug, DEFAULT_DEBUG, &argv, &argc))
usage();
break;
case 'n':
++nflag;
break;
case 'r':
if (!get_number(&retries, -1, &argv, &argc))
usage();
break;
case 't':
if (!get_number(&timeout, -1, &argv, &argc))
usage();
break;
default:
usage();
}
argv++, argc--;
}
if (argc > 1)
usage();
if (argc == 1)
host = argv[0];
else
host = "127.0.0.1";
if ((target_addr = inet_addr(host)) != -1) {
hp = &bogus;
hp->h_length = sizeof(target_addr);
hp->h_addr_list = (char **)malloc(2 * sizeof(char *));
if (hp->h_addr_list == NULL)
logit(LOG_ERR, errno, "malloc");
hp->h_addr_list[0] = malloc(hp->h_length);
if (hp->h_addr_list[0] == NULL)
logit(LOG_ERR, errno, "malloc");
memcpy(hp->h_addr_list[0], &target_addr, sizeof(hp->h_addr_list[0]));
hp->h_addr_list[1] = NULL;
} else
hp = gethostbyname(host);
if (hp == NULL || hp->h_length != sizeof(target_addr)) {
fprintf(stderr, "mrinfo: %s: no such host\n", argv[0]);
exit(1);
}
if (debug)
fprintf(stderr, "Debug level %u\n", debug);
/* Check all addresses; mrouters often have unreachable interfaces */
for (curaddr = 0; hp->h_addr_list[curaddr] != NULL; curaddr++) {
memcpy(&target_addr, hp->h_addr_list[curaddr], sizeof(target_addr));
{ /* Find a good local address for us. */
int udp;
struct sockaddr_in addr;
int addrlen = sizeof(addr);
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
#if (defined(BSD) && (BSD >= 199103))
addr.sin_len = sizeof addr;
#endif
addr.sin_addr.s_addr = target_addr;
addr.sin_port = htons(2000); /* any port over 1024 will
* do... */
if ((udp = socket(AF_INET, SOCK_DGRAM, 0)) < 0
|| connect(udp, (struct sockaddr *) & addr, sizeof(addr)) < 0
|| getsockname(udp, (struct sockaddr *) & addr, &addrlen) < 0) {
perror("Determining local address");
exit(1);
}
close(udp);
our_addr = addr.sin_addr.s_addr;
}
tries = 0;
trynew = 1;
/*
* New strategy: send 'ask2' for two timeouts, then fall back
* to 'ask', since it's not very likely that we are going to
* find someone who only responds to 'ask' these days
*/
ask2(target_addr);
gettimeofday(&et, 0);
et.tv_sec += timeout;
/* Main receive loop */
for (;;) {
struct pollfd set[1];
struct timeval tv, now;
int count, recvlen, dummy = 0;
u_int32_t src, dst, group;
struct ip *ip;
struct igmp *igmp;
int ipdatalen, iphdrlen, igmpdatalen;
set[0].fd = igmp_socket;
set[0].events = POLLIN;
gettimeofday(&now, 0);
tv.tv_sec = et.tv_sec - now.tv_sec;
tv.tv_usec = et.tv_usec - now.tv_usec;
if (tv.tv_usec < 0) {
tv.tv_usec += 1000000L;
--tv.tv_sec;
}
if (tv.tv_sec < 0)
tv.tv_sec = tv.tv_usec = 0;
count = poll(set, 1, tv.tv_sec * 1000 + tv.tv_usec / 1000);
if (count < 0) {
if (errno != EINTR)
perror("select");
continue;
} else if (count == 0) {
logit(LOG_DEBUG, 0, "Timed out receiving neighbor lists");
if (++tries > retries)
break;
/* If we've tried ASK_NEIGHBORS2 twice with
* no response, fall back to ASK_NEIGHBORS
*/
if (tries == 2 && target_level == 0)
trynew = 0;
if (target_level == 0 && trynew == 0)
ask(target_addr);
else
ask2(target_addr);
gettimeofday(&et, 0);
et.tv_sec += timeout;
continue;
}
recvlen = recvfrom(igmp_socket, recv_buf, RECV_BUF_SIZE,
0, NULL, &dummy);
if (recvlen <= 0) {
if (recvlen && errno != EINTR)
perror("recvfrom");
continue;
}
if (recvlen < sizeof(struct ip)) {
logit(LOG_WARNING, 0,
"packet too short (%u bytes) for IP header",
recvlen);
continue;
}
ip = (struct ip *) recv_buf;
if (ip->ip_p == 0)
continue; /* Request to install cache entry */
src = ip->ip_src.s_addr;
dst = ip->ip_dst.s_addr;
iphdrlen = ip->ip_hl << 2;
ipdatalen = ip->ip_len;
if (iphdrlen + ipdatalen != recvlen) {
logit(LOG_WARNING, 0,
"packet shorter (%u bytes) than hdr+data length (%u+%u)",
recvlen, iphdrlen, ipdatalen);
continue;
}
igmp = (struct igmp *) (recv_buf + iphdrlen);
group = igmp->igmp_group.s_addr;
igmpdatalen = ipdatalen - IGMP_MINLEN;
if (igmpdatalen < 0) {
logit(LOG_WARNING, 0,
"IP data field too short (%u bytes) for IGMP, from %s",
ipdatalen, inet_fmt(src, s1));
continue;
}
if (igmp->igmp_type != IGMP_DVMRP)
continue;
switch (igmp->igmp_code) {
case DVMRP_NEIGHBORS:
case DVMRP_NEIGHBORS2:
if (src != target_addr) {
fprintf(stderr, "mrinfo: got reply from %s",
inet_fmt(src, s1));
fprintf(stderr, " instead of %s\n",
inet_fmt(target_addr, s1));
/*continue;*/
}
break;
default:
continue; /* ignore all other DVMRP messages */
}
switch (igmp->igmp_code) {
case DVMRP_NEIGHBORS:
if (group) {
/* knows about DVMRP_NEIGHBORS2 msg */
if (target_level == 0) {
target_level = ntohl(group);
ask2(target_addr);
}
} else {
accept_neighbors(src, dst, (u_char *)(igmp + 1),
igmpdatalen, ntohl(group));
exit(0);
}
break;
case DVMRP_NEIGHBORS2:
accept_neighbors2(src, dst, (u_char *)(igmp + 1),
igmpdatalen, ntohl(group));
exit(0);
}
}
}
exit(1);
}
/* dummies */
void accept_probe(u_int32_t src, u_int32_t dst, char *p, int datalen,
u_int32_t level)
{
}
void accept_group_report(u_int32_t src, u_int32_t dst, u_int32_t group,
int r_type)
{
}
void accept_neighbor_request2(u_int32_t src, u_int32_t dst)
{
}
void accept_report(u_int32_t src, u_int32_t dst, char *p, int datalen,
u_int32_t level)
{
}
void accept_neighbor_request(u_int32_t src, u_int32_t dst)
{
}
void accept_prune(u_int32_t src, u_int32_t dst, char *p, int datalen)
{
}
void accept_graft(u_int32_t src, u_int32_t dst, char *p, int datalen)
{
}
void accept_g_ack(u_int32_t src, u_int32_t dst, char *p, int datalen)
{
}
void add_table_entry(u_int32_t origin, u_int32_t mcastgrp)
{
}
void check_vif_state(void)
{
}
void accept_leave_message(u_int32_t src, u_int32_t dst, u_int32_t group)
{
}
void accept_mtrace(u_int32_t src, u_int32_t dst, u_int32_t group, char *data,
u_int no, int datalen)
{
}
void accept_membership_query(u_int32_t src, u_int32_t dst, u_int32_t group,
int tmo)
{
}
void accept_info_request(u_int32_t src, u_int32_t dst, u_char *p, int datalen)
{
}
void accept_info_reply(u_int32_t src, u_int32_t dst, u_char *p, int datalen)
{
}